<template>
  <p>父组件当前的值为：{{ number }}</p>
  <CustomSubComponent @updateCount="updateEmitCount" />
</template>
<script setup>
import CustomSubComponent from "./CustomSubComponent.vue";
import { ref } from "vue";
const number = ref(10);
const updateEmitCount = (value) => {
  console.log(`value = ${value}`);
  number.value += value;
};
</script>
